Multiple-fuse plug.



' E. STRAN$ZKY.

MULTIPLE FUSE PLUG.

APPLICATION FILED JULY 7, 1914v Patented Feb. 2, 1915.

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Emil Sim szky,

. EMILSTRANSZKY, OE PHILADELPHIA,- BENNSYLVANIA.

MULTIPLE-FUSE PLUG.

Specification of letters Patent.

Patented Feb. 2, 1915.

Application -fi1ed July 7, 1914. SeriaBNo. 849,555.

To all whom. it may concern fBe it known that I, EMlL-STRANSZKY, a.subjectuof the Emperor of .Austria-Hungary, residing. at Philadelphia,in the-county 5 of Philadelphia and- State of Pennsylvania, haveinvented new and useful" Improvewmen-ts in- Multiple-Fuse Plugs,-ofwhich :the following is a specification.

This invention relates to improvements in multiple fuse plugs forelectric circuits.

.In carrying out the present invention, it is my purpose to improveandsimplify the general construction of multiple fuse plugs and toprovide a plug whereby thefusible elements may be. connected in. theelectric circuit successively .as the same become burnt out %therebyeliminating the necessity -Of-I8II10V111g' the. plug'and inserting a new-one. Itis also-my purpose to provide aplug of theclassidescribed'whichmaybe placed finthe circuit rapidly andeasily andwhich .may be =.manipulated conveniently and -.-q uicklytoplace a newfusible element in the circuitsucceeding the'burning out of one of suchelements.

-.With.the' above and other-objects in. view,

qtheuin-ventionconsists .in. the construction,

-- combination and arrangement of .parts -.hereinaftensetforth in andfalling within :thel'scope of the claims.

In the accornpanyingv drawing, Figure 1 E is. a-view .in side elevationof a multiple fuse ..-plug=..constructed in accordance .;with :the.presentinvention. .Fig. 2 is. a:longitudinal sectional. .view..therethrough. Fig.1 3..is an end. view. ofthebody of sthe plng the .capbeing removed. Fig. 4 is. an end v1ew .of\the cap. Figi 5..is a similaropposite end of the cap.

Referring now I to the drawing in :detail, l designates the body-of the.lug constructe'dof porcelain-orother insu atingmaterial and preferably.circular in cross section, one end -of-thebody. being circumferentially.res ,duced as-at 2 and externally sorewthreaded as at .3 so that the.samemay enter the socket or-(receptacle. Formed in the tudinallythereof and centrally? disposed is a bore 4 through which is. passeda'shank 5 havingone end formedwrtha. head 6 in contactwiththe endportion of the reduced extremity of the body. and forming. a contactadapted to be connectedto one side of 'an electric circuit, and .theopposite end pro- -.jecting beyond the adjacent extremity of adjacentend vwall-of .the recess and lahuttmgv the adjacent face of the securing.Illlt, such spring acting to hold the contact .view-- showing; the

- :jmeta'llic shell 15 body 1 1ongi-' the body, while formed in thelast-men- -tioned end of the rotation thereon is a cap 8-composed ofporcelain or other suitable insulating material and arrangedconcentrically of the shank and placed in face to face contact with theface of the cap 8 is an annular row of contact studs 9 disposedconcentrically of the shank and fitting into the depressions 7,

while formed in the outer face of the cap 8 centrally thereof is-arecess 10 provided with a cup-shaped lining 16 having the outeredgethereof bent-upon itself to provide an annular flange lying againstthe outer surface of the cap concentrically of -therecess and forming aconductor ring 11 withwhich are connected a number of fusibleelements;;12..radiati 1i'g' from such ring of the body. On the inner andhaving the outer ends thereof connected with. the contact studs 9'respectively, the fusible elementsbeing embedded in the outer end orface of the cap 8. Threaded onto the extended=end of the shank 5- and.:di.sposed.within.the recess 10 is a securing nut l3 'while surroundingthe shank within the recess isa coiled expansion-spring 14 havingone endin .engagement'with the end the opposite extremity studs seated in. therecesses and force the SlZIKlS/IIIlZO such. recesses in the turning ofthe cap on the body. The outer surface of the. circumferentially reducedend portion "of the. body 1 is preferably inclosed in a adapted toconnect with the other side of the electric circuit and threaded throughthe opening in the body .is a contact screw 16 having one endelectrically connected with the shell 15 and.the opposite end projectinginto one of thede- .pressions 9.=so that the fusible element 12.

connected with the stud seated within the particular depression will beconnected 1n the electric clrcuit and whereby the'fuslble elements maybe connected in the electric circuit successively in the rotation of the'cap.

From the foregoing description taken in connection with the accompanyingdrawing, the construction, mode of operation and manner of employing myinvention Wlll be readily apparent. When the devlce is placed in anelectric circuit the contact formed by the head 6 engages one contact inthe recepthe next adjacent. fuse into the circuit and in the initialmovement of the cap, the latter moves outwardly along the shank againstthe action of the spring 14, incident to the studs riding out of thedepressions, and in the continuedmovement of the cap the studs reenterthe depressions and a new fusible element is thus connected in thecircuit in which the device is installed, the spring 14 reseating thestuds when the latter register with the depressions. When the device isused to carry heavy currents, a wire is employed to connect the upperend of the shank 5 to the ring 11, as clearly illustrated in Figs. 2 and5 of the drawing, such wire insuring the proper carryingv of the currentindependently of the spring and lining.

While I have herein shown and described one preferred form of myinvention by way of illustration, I wish it to be understood that I donot limit or confine myself to the precise details of constructionherein de-' scribed and delineated, as modification and variation may bemade within the scope of the claims without departing from the spirit ofthe invention.

I claim:

1. A multiple fuse plug comprising a body formed centrally with alongitudmal bore and having one end thereof formed with an annular rowof depressions concentrically of the bore, a shank within the bore havinone end thereof provided with a forming a contact adapted to beconnected to one side of the electric circuit and the opposite endprojecting beyond the end of the body having the depressions therein,

a cap surrounding the last-mentioned end of said shank concentricallythereof and rotatable thereabout and in face to face contact withtheadjacent end of the body, an

" annular row of contact studs on the inner face of said. capconcentrically of said shank and fitting into the depressions,fusibleelements carried by said cap corresponding in number with the studs,connections between said elements and studs respectively, a commonconnection between said elements and shank, and a contact screw adaptedto be connected to .the other side of the circuit carried by said bodyand having one end thereofprojecti'ng into one of said depressionswhereby'the fusible elements may be trically of the bore, a shank withinthe bore having one end thereof provided with a head forming a contactadapted to be connected to one side of the electric circuit and theopposite end projecting beyond the end of the body having thedepressions therein, a cap surrounding the last-mentioned end of saidshank concentrically thereof and rotatable thereabout and in face toface contact with the adjacent erld of the body, an annular row ofcontact studs on the inner faceof said cap concentrically of said shankand fitting into the depressions, fusible elements carried by said capcorrespending in number'with the studs, connections between saidelements and studs respectively, a common connection between saidelements and shank, a contact screw adapted to be connected to the otherside of the circuit carried by said body and having one end thereofprojecting intooneof said depressions whereby the fusible elements maybe connected in the circuit successively in the rotation of the cap,said common connection comprising a conductor ring carried by said-capconcentrically of said shank, and a wire connecting said ring andshank.

3. A multiple fuse plug comprising a body formed centrally-with alongitudinal with an annular row of depressions concentrically of thebore, a shank within the bore having one end thereof provided with ahead forming a contact ada ted-tobe connected to one side of theelectric circuit and the o posite end projecting beyond the end of t ebody having the depressions therein, a cap surrounding thelast-mentioned end of said shank concentrically thereof and rotatablethereabout and in face to face contact with the adjacent end of thebody, an annular row of contact studs on the inner face of said capconcentrically of said shank and fitting into the depressions, fusibleelements carried by said cap corresponding in number with the studs,connections between'said elementsand studs, respectively, a commonconnection between said elements and shank, a contact screw adapted tobe connected to the other side'of the circuit carried by said body andhaving one end thereof projecting into one of the depressions wherebythe fusible elements may be connected in the circuit bore and having oneend thereof formed ios thereof, a cap in face to face contact with saidend of the body, an annular row of contact studs on the inner end ofsaid cap and disposed within said depressions, a plurality of fusibleelements carried by said cap and side of the electric circuit wherebythe fusiformed in one end concentrically o ble elements may be connectedin the circuit successively as said cap is rotated. 5. A multiple fuseplug comprising a body having an annular row of de ressions f the axisthereof, a cap in face to face contact with said end of the bod anannular row of contact studs on the inner end of said cap and disposedwithin said depressions, a plurality of fusible elements carried by saidcap and connected to said studs respectivel means carried by said bodyand disposed within one of the depressions therein to engage the stud insuch depression and adapted to be connected to one side of an electriccircuit, a connection between the remaining terminals of said fusibleelements and the other side of the electric circuit whereby the fusibleelements may be connected in the circuit successively as said cap isrotated, and a spring holding said cap in engagement with the body andsaid means in the particular depression.

I In testimony whereof I aifix my signature in presence of twowitnesses.

EMIL STRANSZKY. Witnesses:

E. EDMONSTON, Jr., JOHN J. MCCARTHY.

